Offerings have to be brought without any blemishes. The unblemished
state of an offering symbolizes that when a Jew seeks to come
closer to Hashem, he should do so with all of his faculties, with
nothing omitted.

All references are to the verses and Rashi's commentary,
unless otherwise stated

1:1 - As a sign of affection.

1:5 - A non-Kohen may assist in the avoda until
"receiving the blood". From then on, the avoda
is the exclusive duty of the Kohanim.

1:7 - The fire also descended from heaven.

1:14 - When their plumage becomes a golden color. At that
stage the bnei yona are too old and the turim are
still too young.

1:15 - Through the process of "melika."
With his fingernail the Kohen cuts the nape of the neck.

2:1 - This Minchah is usually brought by the poor.
Hashem values it as if the person has offered his entire soul
(nefesh).

2:1,2:2 - Fine wheat flour mixed with oil on which frankincense
is added.

2:1 - A "kometz" (fistful) of the fine flour
and oil mixture and all the frankincense.

2:2 - A non-Kohen may mix the Minchah until
the taking of a "kometz" (fistful). From then
on, the avoda is the exclusive duty of the Kohanim.

2:12 - On Shavous.

2:14 - Barley.

3:1 - Two reasons: a) It brings "shalom"
(peace) to the world. b) It also creates peace between the
Mizbe'ach, the Kohen, and the owner of the Korban
since each receives a share.

3:8 - The "Chatass".

4:2 - A person who transgressed a negative commandment must
bring a Korban Chatass. This only applies to negative
commandments whose intentional violation is punished with Kares.

4:13 - The Sanhedrin.

5:1-4 - a) One who refrains from giving evidence when implored
by oath; b) One who enters the Beis Hamikdash or eats Kodesh
food after unknowingly contracting "tuma" (spiritual
impurity) by touching certain "tamei" (spiritually
impure) things; c) One who unknowingly violates his oath.

5:11 - The flour sin-offering has no oil or frankincense.

5:15 - Two shekels.

5:16 - The value of the article plus one fifth more.

5:17 - A person who is in doubt whether he unintentionally
transgressed a negative commandment must bring a Korban Asham.
This only applies to negative commandments whose intentional
violation is punished with Kares.